Engineer&#39;s valve.



'PATENTED NOV. 3, 1903.

W. H. NI'GHTINGALE.

ENGINBERS VALVE APPLIOATION FILED MAR. 1a, 1903.

N0 MODEL.

UNITED STATES Patented November 3, 1903.

P TENT OFFICE.

WILLIAM H. NIGI-ITINGALE, OF PHILADELPHIA, PENNSYLVANIA,ASSIGNOR TO JOHN E. REYBURN, OF PHILADELPHIA, PENNSYLVANIA.

ENGINEEIRSIVALVE.

SPEGIFIGATION forming part of Letters Patent No. 743,022, dated November 3, 1903.

Application filed March 13, 1903. Serial No. 147.569. (No model.) i

vented certain new and useful Improvements in Engineers Valves, of which the following is a specification. A

This invention relates to valves for the government of air-brakes for street-railway cars;

- and the object is to produce a valve which can be ground across its entire face and guided by an inclosing cap instead of the small central pin projection heretofore common for valves for the same purpose. The valve rests upon a removable seat, and its cap also incloses a portion of the seat, thereby covering the joint between the valve and its seat and more securely preventing leakage. An operating-handle is provided, which can only be attached to or removed from its stem whenv the reservoir and brake-cylinder passages are closed by means which do away with springs and latches. The handle and valve-stem attach at a point within the case, which prevents manipulation of the valve when the handle is removed. A muffler is formed with the lower part of the case, saving the expense of the usual pipe passing below the platform and aifordin g the motorman an audible means of knowing when full release takes place and without sufficient noise to cause alarm or fright, which is a very desirable feature for cars where sudden stops are frequently necessary in crowded city streets.

The accompanying drawings illustrate the features of construction, with similar parts designated by similar characters of reference, and in which Figure 1 is in general a central vertical section with some parts not in section. Fig. 2 is a plan or top view with the handle in position when the valve is at lap, or the reservoir and brake-cylinder passages closed. Fig. 3 is a section of the upper partof the case, showing the handle in position for removal or as just inserted, asin Fig. 2. Fig. 4 is a bottom view of the case and muffler. Fig. 5 is a top view of the valve. Fig. 6 is a top view of the valve-cap. Fig. '7 is a section on line a: a, Fig. 1, showing thevalve and ports at lap, or when the reservoir and brake passages are covered, as in Figs. 1, 2, and 3. Fig. 8 is in section on line 00 a Fig. 1, showing the valve and ports at emergency, or when the reservoir and brake passages are in full communication fora quick stop. Fig. 9 isa section on line 00 as, Fig. 1, showing the valve and ports F in service, or when the reservoir and brake passages are in partial communication for a slow stop. tion on line 00 w, Fig.1,showing the valve and ports at full release, or when the brake is cut off from pressure and the air passes through the mufiier to the atmosphere. Fig. 11 is aplan of the removable valve-seat. Fig. 12 is a modificationof the means for the joining of thehandle and the valve-stem.

The case comprises an upper part 1 and a lower part 2, secured together by bolts 3, and between them the removablevalve-seat 1 is held, and 'dowel pin 5 prevents its turning. A washer or gasket 6 is inserted between parts 1 2 as a precaution against air escape. Valveseat 4 has an upward projecting ring 7, around which is closely fitted the valve-cap 8, its outer diameter 9 closely fitting within case 1, while its top 10 rests under a ledge 11 within case 1, with an elongated slot 12 formed through it at its center. Within cap 8 and resting 011 seat 4 is the valve 13, formed by an outer circular wall 14 and a solid top wall 15, from which is an upward elongated projection 16, passing through slot 12 of cap 8. The bottom 17 of the valve has ports 18 19 therethrough to its hollow interior 20.

Part 2 of the case has a passage 21, to which is secured pipe 22 from the pressure-reservoir,

and a passage 23, witha pipe 24 leading to the brake-cylinders. Passages 21 23 are always in communication with passages 25 26 through seat 4, and passage 27 in the seat is always in communication with exhaust-passage 28 to the mufiier. i

Seat 1, valve 13, and cap 8 can be ground to air-tight surfaces by removal from the case.

The cap guides the valve and leavesthe valve and its seat free from objectionable attachments which prevent proper grinding and tend to cause leakage, while part 29 of cap 8 Fig. 10 is a sec leakage.

The valve is operated by stem 31, which has bifurcations 32, engaging projection 16 of the valve. Above the bifurcations is a collar 33, seated under ledge 34 of the case in its chamber 35. Stem 31 at its top has oppositely-inclined or angled flattened sides 36, which form an inverted V and at a point considerably below the top of case 1. The upper part of case 1 is enlarged in diameter and has within it a circular groove 37, with a slot 38 opening through the top 39 (best seen in Figs. 2 and 3) and at apoint opposite handle when it has moved to lap or to cause valve 13 to close passages 25 26 of seat 4. Handle 40 has a downward circular section projection 41, bifurcated to fit over angles 36 and whereby stem 31 is moved, and a projection 42, adapted to pass through slot 38 to groove 37, and the handle as soon as turnedcannot be removed until again at lap or until projection 42 is at slot 38. The handle has a flange 43 for its support 011' case 1 and to cover slot 38. In Fig. 12 is shown a modification of the joining of the stem and handle by single angular faces 44 45.

The mufiler is a portion of part 2 of the case, having side walls 46 47, upper wall 48, and lower wall 49, through which are multiple perforations 50 for the exit of the exhaustair, which enters the muffier through the exhaust-port 28. The back wall of the muffler is formed by the cars dasher 51, to which it and the valve-case are secured by bolts 52. Passages 53 permit the exit of any foreign substance which enters above the stem while the handle is removed. 54 55 56 are oil-passages, it being designed to have chamber 35 filled with oil to lubricate the movable parts and also to prevent any escape of air.

I claim 1. In an engineers valve, a two-part case, a removable valveseat between the case parts, air-passages to and from the case, and in the seat, an upward projection on the seat, a valve upon the seat with ports controlling the air-passages, a cap surrounding, covering, and guiding the valve, projecting below the contact of the valve and its seat and surrounding the aforesaid upward projection on the seat, and means to rotate the valve and its cap in unison.

2. In an engineers valve, a case, a valve covered and rotatably guided by a cap, and means for their simultaneous movement, a stem confined within the case, adapted to move the valve and its cap, having its upper end extended to a point below the top of the case and flattened at the sides to form an inverted-V shape.

3. I11 an engineers valve, a case, a valve covered and guided by a cap, and means for their movement in unison, a stem confined within the case, adapted to move the valve and its cap, having its upper end extended to a point below the top of the case and one side flattened at an angle to its longitudinal central line.

4. In an engineers valve, a case having an inclosed circular groove at its upper end with a slot therefrom through the top of the case, a valve within the case, a stem engaging the Valve for its movement, and a handle adapted to engage the stem and having a projection adaptedto pass through the slot aforesaid, and upon the rotation of the handle enter the groove and prevent the removal of the handle until the projection again comes to the slot.

5. In an engineers valve, a case having an inclosed circular groove within its upper end, a slot therefrom through the top of the case, a valve within the case, a stem engaging the valve at its lower end and at its upper end flattened to a V shape and below the groove aforesaid, a handle having a portion adapted to enter the case and grasp the V shape of the stem, and a projection adapted to pass through the slot and enter the groove in the case.

6. In an engineers valve, a case havingan inclosed circular gooove within its upper end, a slot therefrom through the top of the case, a valve within the case, a stem engaging the valve at its lower end, flattened on one side of its upper end at an angle to its central line and below the groove aforesaid, a handle having a-portion adapted to enter the case and abut the flattened side of the stem, and a projection adapted to pass through the slot and enter the groove.

7. In an engineers valve, a case, a valve within the case, means for its movement, airpassages to and from the case and controlled by the valve, and a muffler upon the case and through which the air is exhausted and having means to deaden the sound of the escaping air.

8. In an engineers valve, a case in two parts, a valve-seat between the parts, a valve upon the seat and means for its rotary movement, air-passages to and from the case and through the valve-seat, an inclosed muffier upon the lower part of the case, multiple apertures therefrom, a port thereto in com munication with a port in the valve-seat and adapted upon the release movement of the valve to pass air to the muffler.

In testimony whereof I affix my signature in presence of two witnesses.

WVILLIAM H. NIGI'ITINGALE. lVitnesses:

RANSOM O. WRIGHT, WILLIAM C. Sronvnn.

IIO 

